#define _CRT_SECURE_NO_WARNINGS 1
struct TreeNode {
    int val;
    TreeNode* left;
    TreeNode* right;
    TreeNode() : val(0), left(nullptr), right(nullptr) {}
    TreeNode(int x) : val(x), left(nullptr), right(nullptr) {}
    TreeNode(int x, TreeNode* left, TreeNode* right) : val(x), left(left), right(right) {}
    
};
class Solution {
public:
    bool checkTree(TreeNode* root) {
        return root->val == root->left->val + root->right->val;
    }
};
